Unit1-1-R2-Earth4Systems

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Unit 1 - Chapter 1

Reading 2: Earth's Four Systems


Go to the links below to learn more about

  • the Earth's four systems or spheres, go to http://goo.gl/kimk
  • the 4 interactions that occur between an event ( for example, forest fires) and each Earth system, go to http://goo.gl/YzHu
  • the 8 interactions that occur among the four systems when an event occur, go to http://goo.gl/49SI

How Global Warming Affects Polar Bear Natural Habitat??

Watch the following video to find the answer